Wagon is known for his eclectic mathematical interests. He researches how computers can be used to help see and understand mathematical objects that are difficult to visualize such as differential equations. He recently received national media attention for his invention of a square-wheeled bicycle. He has written several books including Solutions to Differential Equations, A Course in Computational Number Theory, co-written with David Bressoud, Mathematica in Action and Which Way Did the Bicycle Go? based on 25 years of Macalester's “Problem of the Week.” EDUCATION:B.A., McGill University Ph.D., Dartmouth College Wagon has been teaching at Macalester since 1990.